WASP-26

WASP-26
Observation data; Epoch J2000 Equinox J2000
Constellation	Cetus
Right ascension	00h 18m 24.7008s
Declination	−15° 16′ 02.276″
Apparent magnitude (V)	11.30
Characteristics
Evolutionary stage	subgiant
Spectral type	G0
B−V color index	0.32[citation needed]
J−H color index	0.246[citation needed]
J−K color index	0.411[citation needed]
Astrometry
Radial velocity (Rv)	9.07±0.41 km/s
Proper motion (μ)	RA: +27.416 mas/yr ; Dec.: −24.524 mas/yr
Parallax (π)	3.9574±0.0247 mas
Distance	824 ± 5 ly ; (253 ± 2 pc)
Details
Mass	1.095±0.043 M☉
Radius	1.284±0.035 R☉
Luminosity	1.84 L☉
Surface gravity (log g)	4.260±0.022 cgs
Temperature	6015±55 K
Metallicity [Fe/H]	−0.02±0.09 dex
Rotational velocity (v sin i)	3.9±0.4 km/s
Age	4.0+5.9; −4.0 Gyr
Other designations
	TOI-2386, TIC 32487566, WASP-26, TYC 5839-876-1, 2MASS J00182469-1516022, DENIS J001824.6-151601
Database references
SIMBAD	data
Exoplanet Archive	data

WASP-26 is a G-type subgiant star about 824 light-years away in the constellation of Cetus.

Star characteristics

WASP-26 is an old star close to leaving the main sequence and is part of a wide binary. The binary's projected separation is 3800 astronomical units, its companion star being a K-type star with an effective temperature of 4600K and a visual magnitude of 13.6.^[5] WASP-26 produces a large amount of ultraviolet light due to frequent flares, with an average ultraviolet flux close to the F7 class main-sequence star WASP-1.^[9]

Planetary system

The hot Jupiter class planet WASP-26b was discovered around WASP-26 in 2010.^[5] The planet would have an equilibrium temperature of 1660±40 K, but measured temperatures are slightly higher at 1775K and no noticeable difference exists between the day-side and the night-side of the planet.^[10] A 2011 study using the Rossiter-McLaughlin effect failed to determine the inclination of the planetary orbit to the equatorial plane of the parent star due to high stellar noise,^[7] but an initial constraint of -34⁺³⁶
₋₂₆° was published in 2012.^[11]

The WASP-26 planetary system^[12]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.038+0.020 −0.021 $M$ _J	0.03997+0.00035 −0.00036	2.7565972(19)	<0.0039	82.83±0.27^[6]°	1.216±0.047^[6] $R$ _J

References

^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
^ ^a ^b ^c ^d ^e ^f ^g ^h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H.
^ Irwin, Stacy Ann (2015). Analysis of Angular Momentum in Planetary Systems and Host Stars (Thesis). Bibcode:2015PhDT.........5I.
^ ^a ^b ^c Smalley, B.; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Triaud, A. H. M. J.; West, R. G.; Bentley, S. J.; Enoch, B.; Pepe, F.; Pollacco, D. L.; Segransan, D.; Smith, A. M. S.; Southworth, J.; Udry, S.; Wheatley, P. J.; Wood, P. L.; Bento, J. (2010). "WASP-26b: A 1-Jupiter-mass planet around an early-G-type star". Astronomy and Astrophysics. 520: A56. arXiv:1004.1542. Bibcode:2010A&A...520A..56S. doi:10.1051/0004-6361/201014705. S2CID 55114421.
^ ^a ^b ^c Southworth, John; Hinse, T. C.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Galianni, P.; Gerner, T.; Giannini, E.; Gu, S.-H.; Hundertmark, M.; Jørgensen, U. G.; Juncher, D.; Kerins, E.; Mancini, L.; Rabus, M.; Ricci, D.; Schäfer, S.; Skottfelt, J.; Tregloan-Reed, J.; Wang, X.-B.; Wertz, O.; Alsubai, K. A.; Andersen, J. M.; Bozza, V.; Bramich, D. M.; Browne, P.; Ciceri, S.; d'Ago, G.; Damerdji, Y.; et al. (2014). "High-precision photometry by telescope defocussing – VI. WASP-24, WASP-25 and WASP-26★". Monthly Notices of the Royal Astronomical Society. 444 (1): 776–789. arXiv:1407.6253. Bibcode:2014MNRAS.444..776S. doi:10.1093/mnras/stu1492. S2CID 53641330.
^ ^a ^b Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; Vanhuysse, M. (2011). "Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26". Astronomy & Astrophysics. 534: A16. arXiv:1106.6092. Bibcode:2011A&A...534A..16A. doi:10.1051/0004-6361/201117597. S2CID 31204371.
^ "WASP-26". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-02-19.
^ Shkolnik, Evgenya L. (2013). "An Ultraviolet Investigation of Activity on Exoplanet Host Stars". The Astrophysical Journal. 766 (1): 9. arXiv:1301.6192. Bibcode:2013ApJ...766....9S. doi:10.1088/0004-637X/766/1/9.
^ Mahtani, D. P.; Maxted, P. F. L.; Anderson, D. R.; Smith, A. M. S.; Smalley, B.; Tregloan-Reed, J.; Southworth, J.; Madhusudhan, N.; Collier Cameron, A.; Gillon, M.; Harrington, J.; Hellier, C.; Pollacco, D.; Queloz, D.; Triaud, A. H. M. J.; West, R. G. (2013). "Warm Spitzer occultation photometry of WASP-26b at 3.6 and 4.5 μm". Monthly Notices of the Royal Astronomical Society. 432 (1): 693–701. arXiv:1303.4596. Bibcode:2013MNRAS.432..693M. doi:10.1093/mnras/stt505. S2CID 55842630.
^ Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D.; Shectman, Stephen A.; Thompson, Ian B.; Hirano, Teruyuki; Bakos, Gaspar; Hartman, Joel D. (2012), "Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments", The Astrophysical Journal, 757 (1): 18, arXiv:1206.6105, Bibcode:2012ApJ...757...18A, doi:10.1088/0004-637X/757/1/18, S2CID 17174530
^ Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.

[Roman1987-1] Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.

[GaiaDR3-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[TYC2-3] Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H.

[4] Irwin, Stacy Ann (2015). Analysis of Angular Momentum in Planetary Systems and Host Stars (Thesis). Bibcode:2015PhDT.........5I.

[Smalley2010-5] Smalley, B.; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Triaud, A. H. M. J.; West, R. G.; Bentley, S. J.; Enoch, B.; Pepe, F.; Pollacco, D. L.; Segransan, D.; Smith, A. M. S.; Southworth, J.; Udry, S.; Wheatley, P. J.; Wood, P. L.; Bento, J. (2010). "WASP-26b: A 1-Jupiter-mass planet around an early-G-type star". Astronomy and Astrophysics. 520: A56. arXiv:1004.1542. Bibcode:2010A&A...520A..56S. doi:10.1051/0004-6361/201014705. S2CID 55114421.

[Southworth2014-6] Southworth, John; Hinse, T. C.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Galianni, P.; Gerner, T.; Giannini, E.; Gu, S.-H.; Hundertmark, M.; Jørgensen, U. G.; Juncher, D.; Kerins, E.; Mancini, L.; Rabus, M.; Ricci, D.; Schäfer, S.; Skottfelt, J.; Tregloan-Reed, J.; Wang, X.-B.; Wertz, O.; Alsubai, K. A.; Andersen, J. M.; Bozza, V.; Bramich, D. M.; Browne, P.; Ciceri, S.; d'Ago, G.; Damerdji, Y.; et al. (2014). "High-precision photometry by telescope defocussing – VI. WASP-24, WASP-25 and WASP-26★". Monthly Notices of the Royal Astronomical Society. 444 (1): 776–789. arXiv:1407.6253. Bibcode:2014MNRAS.444..776S. doi:10.1093/mnras/stu1492. S2CID 53641330.

[Anderson2011-7] Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; Vanhuysse, M. (2011). "Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26". Astronomy & Astrophysics. 534: A16. arXiv:1106.6092. Bibcode:2011A&A...534A..16A. doi:10.1051/0004-6361/201117597. S2CID 31204371.

[Simbad-8] "WASP-26". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-02-19.

[9] Shkolnik, Evgenya L. (2013). "An Ultraviolet Investigation of Activity on Exoplanet Host Stars". The Astrophysical Journal. 766 (1): 9. arXiv:1301.6192. Bibcode:2013ApJ...766....9S. doi:10.1088/0004-637X/766/1/9.

[10] Mahtani, D. P.; Maxted, P. F. L.; Anderson, D. R.; Smith, A. M. S.; Smalley, B.; Tregloan-Reed, J.; Southworth, J.; Madhusudhan, N.; Collier Cameron, A.; Gillon, M.; Harrington, J.; Hellier, C.; Pollacco, D.; Queloz, D.; Triaud, A. H. M. J.; West, R. G. (2013). "Warm Spitzer occultation photometry of WASP-26b at 3.6 and 4.5 μm". Monthly Notices of the Royal Astronomical Society. 432 (1): 693–701. arXiv:1303.4596. Bibcode:2013MNRAS.432..693M. doi:10.1093/mnras/stt505. S2CID 55842630.

[11] Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D.; Shectman, Stephen A.; Thompson, Ian B.; Hirano, Teruyuki; Bakos, Gaspar; Hartman, Joel D. (2012), "Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments", The Astrophysical Journal, 757 (1): 18, arXiv:1206.6105, Bibcode:2012ApJ...757...18A, doi:10.1088/0004-637X/757/1/18, S2CID 17174530

[Bonomo2017-12] Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.

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WASP-26

Star characteristics

Planetary system

References

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